(-)-白花前胡乙素 (4970-26-7)

2-Butenoic acid, 2-methyl-, (9R,10R)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9,10-diyl ester, (2Z,2'Z)-;

(9R,10R)-8,8-Dimethyl-2-oxo-9,10-dihydro-2H,8H-pyrano[2,3-f]chromene-9,10-diyl (2Z,2'Z)bis(2-methyl-2-butenoate);

(-)-Praeruptorin B;